A random access method in differentiation oriented mtc network
A random access and differentiated technology, applied in machine-to-machine/machine-type communication services, electrical components, wireless communications, etc., can solve the problem of high control signaling overhead, waste of access resources, increased network load pressure, etc. question
Active Publication Date: 2021-01-19
XI AN JIAOTONG UNIV
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Problems solved by technology
At present, the MTC network mainly faces the following challenges: On the one hand, the access of a large number of MTC terminals increases the network load pressure and easily leads to network congestion, which further leads to the waste of access resources and the increase of access delay. Appear
On the other hand, due to the small data packet transmission characteristics of the MTC service, if the random access scheme in the LTE network is directly adopted, it will lead to excessive control signaling overhead and excessive access delay, which cannot meet the requirements of mMTC services and URLLC. business performance requirements
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[0062] The present invention is described in further detail below in conjunction with accompanying drawing:
[0063] refer to figure 1 , the random access method in the differentiated MTC network of the present invention comprises the following steps:
[0064] System model such as figure 1 As shown, the differentiated MTC network consists of a base station, K mMTC devices, and U URLLC devices. According to the definition of 5G-related standards, the services carried by mMTC devices are assumed to be delay-insensitive services, and their main feature is massive access scale ; On the other hand, the services carried by the URLLC equipment are ultra-reliable and low-latency services, and the URLLC equipment requires that the end-to-end delay does not exceed D max =1ms at the same time, the transmission reliability is higher than 99.999%, that is, p rel ≥1-φ max =99.999%; Due to the huge difference in performance indicators between mMTC business and URLLC business, the base st...
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Disclosed is a random access method in a differentiated MTC network, comprising the following steps: calculating the access success probabilities p1 and p2 of an mMTC device in a mMTC access service frequency band and a URLLC access service frequency band; establishing an optimization problem by using an access control parameter θ, a traffic offload parameter Δθ, and a total backoff step length W of the mMTC device as variables and taking the maximization of the throughput of a mMTC service as an optimization goal on the premise of ensuring the URLLC service transmission performance; according to the access success probabilities p1 and p2 of the mMTC device in the mMTC access service frequency band and the URLLC access service frequency band, calculating the optimization problem to obtain an optimal access control parameter, the traffic offload parameter, and the total backoff step length (θ*, Δθ*, W*) of the mMTC device; and then according to the optimal access control parameter, the traffic offload parameter, and the total backoff step length (θ*, Δθ*, W*) of the mMTC device, performing random access in the differentiated MTC network. The method can realize the random access of the differentiated MTC network, and is high in reliability and low in delay.
Description
technical field [0001] The invention belongs to the technical field of uplink transmission of machine equipment communication services, and relates to a random access method in a differentiated MTC network. Background technique [0002] According to the definition of 3GPP, Machine Type Communications (MTC) refers to the communication form of data transmission and processing between machines or smart devices through the network without human intervention. Different from traditional Human-to-Human (H2H) communications, MTC services have the characteristics of massive access scale, large service differences, and discrete small packet transmission. In the future 5G network, according to different business requirements and application scenarios, MTC services can be divided into the following two categories: 1) Massive Machine Type Communications (mMTC), which is mainly for low-power consumption in the Internet of Things Large connection scenarios, such as smart meters, traffic d...
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IPC IPC(8): H04W4/70H04W24/02H04W74/08
CPCH04W24/02H04W74/0833H04W4/70
Inventor 任品毅谢云聪王熠晨杜清河徐东阳
Owner XI AN JIAOTONG UNIV